Leather tape drawing frame with drawing guide



E. TOENNIESSEN LEATHER TAPE DRAWING FRAME WITH DRAWING GUIDE Sept. 29,1942.

Filed Sept. '25. 1940 Patented Sept. 29, 1942 LEATHER TAPE DRAWING FRAMEWITH DRAWING GUIDE Ernst Toenniessen, Munich, Germany; vested in theAlien Property Custodian Application September 23, 1940, Serial No.358,024 In Germany June 22, 1940 4 Claims.

The invention relates to drawing frames of the type having a lower belt,and a device for guiding the roving during its travel toward the drawingrollers, which cooperates with the plane surface of the belt.

Commonly used constructions wherein the guiding means is constituted ofa roller of small diameter, and a loading plate or the like, have notproven elfective. In most cases, the distance between the clamping linesof the two pairs of rollers, which include the guiding means, has beenmade relatively great and the section of the guiding means was equallymade relatively long in the direction in which the roving travels. Thispresents the objection of the collection of fibers beneath the guidingmeans, resulting in an irregular yarn formation. In other constructions,particularly where the guiding means cooperating with a lower belt isformed by an additional roller, the effective surface of the guidingmeans is very small, and affords ineffective guiding. In cases where theguiding means has hinge-like bearings this causes varying pressures tobe exerted upon the roving.

The object of the invention, therefore, is to provide an improveddrawing frame of the above type in which the requirements of thesmallest possible distance between the clamping lines of the pairs ofrollers and the guide means, and of the greatest possible surface of theguiding means, together with vertical movement of the latter, arefulfilled.

Another object of the invention, is to provide an improved apparatus ofthe above type in which that part of the surface of the guide means llwhich cooperates with the belt, can be adjusted when the distancebetween the rollers of the drawing frame is varied, and when the runnerprojects beyond the reversing point of the belt,

' however without affecting the distance between the end of the passageand the clamping point of the drawing rollers;

Still further the invention aims to provide a runner, which is hollow toreceive therein loading weights to adjust and thereby adapt same todifferent kinds of fibers.

Two embodiments of the invention are diagrammatically illustrated in theaccompanying drawing, in which- Fig. 1 shows a leather tape drawingframe with drawing guide in side elevation,

Fig. 2 shows the elements in top plan view on one side of the holder ofthe pressing rollers,

Fig. 3 shows in front elevation the journal point of a runner,

Fig. 4 shows a modified construction of Fig. 3,

Fig. 5 shows the cooperating elements of the drawing guide, the runnerbeing of different cross-section.

In the drawing frame illustrated in Fig. 1 the drawing rollers aredesignated by I, I, the middle rollers by II, 2, the feed rollers byIII, 3. Between the drawing rollers I, I and the middle rollers II, 2 adrawing guide is located. This drawing guide is formed from below by aleather tape 4 which travels from the lower middle roller II over theplane surface of a narrow heartshaped reversing bar 5 and thencedownwards over a stretching means 6. The drawing guide from above isformed by a runner I of dropshaped cross-section, the tapered end 3 ofthe runner extending far beyond the reversing point of the leather tape4 and close to the clamping point of the drawing rollers I, I. The pairsof rollers I, I and II, 2 are comparatively close together so that therunner I lies within the space between the adjacent arcs of the twopressure rollers I, 2.

As shown in Fig. 3, the runner I has at each end an extension 9 reachingfrom the base line of the runner to beyond the apex of the same in anupward direction and forming a guide bar engaging in a straight guideIll formed by a groove. The runner is thus guided, so that it canneither turn nor tilt in a longitudinal direction, but can only move upand down when it is being adjusted, its bearing face always remains in ahorizontal plane. Thus a uniform pressure transmission upon the rovingduring the up and down movement of the runner is obtained. Theextensions 9 may either be directed upwards in straight guides III, asshown in Figs. 1 and 3, or project in lateral direction, as shown inFig. 4, the projecting portions forming handles II, so that the runnercan be gripped on the extensions 9 and removed in an upward directionfrom the guide grooves III.

The pressure rollers I, 2 and 3 are in usual manner mounted in a holderfor pressure rollers consisting of two mutually shiftable parts I2 andI3. The upper drawing roller I is journalled in the head I2 of theholder. For the pressure roller 2 the other part I3 of the holder has anincision I4 which is considerably wider than the diameter of the journalI5 of this roller. of the runner I are also arranged in this rear partI3 oi the holder. If the runner has to be removed in upward directionwhen the drawing frame is in the narrow position, the roller I is Thebearing guides III for the journalsv first removed and the roller 2shifted in its wide bearing slot I 4 towards the feed roller 3. If theslot I0 is wider than the extension 9 of the runner I, it is notnecessary to remove the roller l, as the runner can be pulled backtowards roller 2, so that it can be removed in an upward directionwithout contacting with the roller I.

The drawing rollers I, l have normally a certain, stationary position.If the drawing frame is opened by pulling back the middle rollers II, 2,the runner l is at the same time shifted to the right on the leathertape 4. When adjusting for greater staple length, the bearing face ofthe runner on the leather tape is therefore enlarged and the specificpressure correspondingly reduced, whereas, owing to the far projectingend 8 of the runner, the distance between the end edge of this bearingface, forming the passage point, and the clamping point of the rollersI, l is preserved.

The runnerifi, as shown in Fig. 5, may be of triangular cross-sectionand fill substantially the space between the pressure rollers I, 2 whichare disposed in close relation to each other,

whereby when the roller distances are very narrow, a sufficient loadingand at the same time a comparatively large guide face on the lower edgeof the runner. The runner is preferably hollow and detachable at leastat one end of the extension 9, so that heavy loading weights may be,

"reversing bar and between said drawing and 'rniddle rollers and havinglateral verticalextensions connected to its ends, the width of said railbeing smaller than the diameter between the clamping lines of saiddrawing and middle rollers in such manner that the front and rear edgesof said guide runner are overlapped by the vertical projections of theupper drawing and middle rollers, and a holder for positioning saidupper rollers, having Vertical guide slots to receive the lateralvertical extensions of said guide runner.

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2. A drawing frame for textile rovings, including pairs of upper andlower drawing rollers, middle rollers and feed rollers, a belt reversingbar disposed between the lower drawing and middle rollers, a lower beltrunning about the lower middle roller and said belt reversing bar, aguide runner composed of a hollow rail having a plane lower surface,loading means exchangeably disposed within said'hollow rail, said railbeing disposed above said belt reversing bar and between said drawingand middle rollers, lateral vertical extensions connected to the ends ofsaid-hollow rail, and a holder for positioning said upper rollers havingvertical guide slots to receive the lateral vertical extensions of saidguide runner.

3. A drawing frame for textile rovings, in-

middle rollers and feed rollers, a belt reversing bar disposed betweenthe lower drawing and middle rollers, a lower belt running about thelower middle roller and said belt reversing bar, a guide runner composedof a rail having a plane lower surface, said rail being disposed abovesaid belt reversing bar and between said drawing and middle rollers,lateral vertical extensions disposed at and connected to the ends ofsaid rail, a holder for positioning said upper rollers having verticalguide slots to receive the lateral vertical extensions of said guiderunner, and said lateral vertical extensions projecting beyond the guideslots of said holder and forming handles.

4. A drawing frame for textile rovings, including pairs of upper andlower drawing rollers, middle rollers and feed rollers, a stationarybelt reversing bar disposed between the lower drawing and middlerollers, a belt running about the lower middle roller and said beltreversing bar, a guide runner composed of a rail having a plane lowersurface, said rail being disposed above said belt reversing bar andbetween said drawing and middle rollers and extending beyond said beltreversing bar and towards said drawing rollers, a holder for positioningall of the upper rollers, said holder being composed of elements whichare displaceable in the direction of movement of the roving withrelation to said belt reversing bar, lateral vertical guiding extensionsdisposed at the ends of said guide runner, there being vertical guideslots in said displaceable element of said holder, and said slots beingdisposed to receive the lateral guide extensions of said guide runner,and being of greater width than that of the extensions.

ERNST TOENNIESSEN.

